Sidelink Positioning Reference Signal Transmissions

3. The apparatus of claim 1, wherein the candidate frequency resources are configured for the sidelink PRS transmission, wherein the candidate frequency resources correspond to an unlicensed bandwidth that is channelized to form a plurality of sub-bands, and wherein the sub-band channel access is performed for each of the plurality of sub-bands.

9. The apparatus of claim 8, wherein the sidelink positioning assistance message prior to the sidelink PRS transmission, as transmitted to the sidelink Rx mobile station, indicates a sidelink PRS configuration, wherein the sidelink PRS configuration indicates the candidate frequency resources and the time resources associated with the sidelink PRS transmission.

10. The apparatus of claim 8, wherein the sidelink positioning assistance message after the sidelink PRS transmission, as received from the sidelink Rx mobile station, indicates measurements associated with the sidelink PRS transmission.

12. The apparatus of claim 1, wherein the sidelink PRS transmission is associated with a time window to finish the sidelink PRS transmission, wherein the sidelink PRS transmission occurs during a time window of a sidelink PRS transmission occasion, and wherein the time window to finish the sidelink PRS transmission is less than the time window of the sidelink PRS transmission occasion.

18. The method of claim 16, wherein the candidate frequency resources are configured for the sidelink PRS transmission, wherein the candidate frequency resources correspond to an unlicensed bandwidth that is channelized to form a plurality of sub-bands, and wherein the sub-band channel access is performed for each of the plurality of sub-bands.

24. The method of claim 23, wherein the sidelink positioning assistance message prior to the sidelink PRS transmission, as transmitted to the sidelink Rx mobile station, indicates a sidelink PRS configuration, wherein the sidelink PRS configuration indicates the candidate frequency resources and the time resources associated with the sidelink PRS transmission.

25. The method of claim 23, wherein the sidelink positioning assistance message after the sidelink PRS transmission, as received from the sidelink Rx mobile station, indicates measurements associated with the sidelink PRS transmission.

27. The method of claim 16, wherein the sidelink PRS transmission is associated with a time window to finish the sidelink PRS transmission, wherein the sidelink PRS transmission occurs during a time window of a sidelink PRS transmission occasion, and wherein the time window to finish the sidelink PRS transmission is less than the time window of the sidelink PRS transmission occasion.